There's been some chatter on the blog in regards to "choosing between polls," as if this was intrinsically problematic or ideologically driven. It's not. Here's my basic criterion for whether I believe a poll:
a) Is the source credible? That is, is the pollster not obviously in hoc to one or the other party, or someone who doesn't poll frequently enough for me to have confidence in the quality of their results;
b) Is the poll way off where the last presidential vote was?
c) Most important, is the poll not corroborated by other polls?
The Maryland poll, for example, is by a credible pollster, but criteria b and c are clearly violated. In the case of the latest Wisconsin poll, all three criteria are violated. So instead of casting aspersions, let's try to stick to the facts, and if you don't buy a poll, that's fine--explain why you agree with it or not, rather than falling back on partisan cheerleading. There are plenty of blogs for that sort of thing, and this ain't it.